2002-07-27  Zbigniew Chyla  <cyba@gnome.pl>

	* src/gutils.c:
	Converted g_string_[s]list_copy to more general functions,
	g_[s]list_map.

	* src/gutils.h:
	(g_[s]list_map): New
	(g_[s]tring_list_copy): Converted to macro (using g_[s]list_map)
	(g_list_to_vector, g_list_to_vector_custom, g_vector_free_custom,
	g_slist_to_vector):
	Removed
	(GNM_[S]LIST_SORT): New members of GNM_[S]LIST_* family.
	(GNM_SIZEOF_ARRAY): New macro

	* src/error-info.h:
	(GNM_INIT_RET_ERROR_INFO):
	New macro, I plan to add some extra code here.

	* src/plugin-service.[ch]
	PluginService and PluginService* are GObjects now
	(with three virtual methods: read_xml, activate, deactivate).
	All implementation details are hidden. Every PluginService* exposes
	only service-specific PluginService*Callbacks struct (returned by
	plugin_service_get_cbs function) for use by plugin loaders.
	Placed "id" attribute in PluginService struct instead of
	duplicating it in other structs.
	(plugin_service_{get,set,clear}_loader_data): Removed
	s/plugin_service_read/plugin_service_new/

	* src/plugin.c
	Adjusted to plugin-service.h changes
	(struct _GnmPlugin): Replace vectors with SLists.
	(plugins_shutdown): Destroy all plugins (g_object_unref).
	Use GNM_INIT_RET_ERROR_INFO everywhere.

	* src/plugin-loader.c
	(gnumeric_plugin_loader_unload_service_general_real,
	gnumeric_plugin_loader_unload_service_file_opener_real,
	gnumeric_plugin_loader_unload_service_file_saver_real,
	gnumeric_plugin_loader_unload_service_function_group_real,
	gnumeric_plugin_loader_unload_service_plugin_loader_real):
	Set callbacks using plugin_service_get_cbs and PluginService*Callbacks
	structs, instead of settings PluginService* fields directly (they are
	private now).
	(gnumeric_plugin_loader_load_service,
	gnumeric_plugin_loader_unload_service)
	Use RTTI to select (un)loading method.
	(gnumeric_plugin_loader_set_attributes,
	gnumeric_plugin_loader_load_base,
	gnumeric_plugin_loader_unload_base):
	Use GNM_INIT_RET_ERROR_INFO macro everywhere.

	* src/plugin-loader-module.c
	(gnumeric_plugin_loader_module_set_attributes,
	gnumeric_plugin_loader_module_load_base,
	gnumeric_plugin_loader_module_unload_base,
	gnumeric_plugin_loader_module_info_get_extra_info_list,
	gnumeric_plugin_loader_module_destroy,
	gnumeric_plugin_loader_module_func_init,
	gnumeric_plugin_loader_module_func_clean,
	gnumeric_plugin_loader_module_load_service_general,
	gnumeric_plugin_loader_module_func_file_probe,
	gnumeric_plugin_loader_module_func_file_open,
	gnumeric_plugin_loader_module_load_service_file_opener,
	gnumeric_plugin_loader_module_func_file_save,
	gnumeric_plugin_loader_module_load_service_file_saver,
	gnumeric_plugin_loader_module_func_get_full_function_info,
	gnumeric_plugin_loader_module_load_service_function_group,
	gnumeric_plugin_loader_module_unload_service_function_group,
	gnumeric_plugin_loader_module_func_get_loader_type,
	gnumeric_plugin_loader_module_load_service_plugin_loader):
	Use g_object data instead of plugin_service_[gs]et_loader_data.
	Set callbacks using plugin_service_get_cbs and PluginService*Callbacks
	structs, instead of settings PluginService* fields directly (they are
	private now).
	"has_probe" field has been removed, always get a pointer to
    *_file_probe pointer function if it's available.
	Less assertions, use GNM_INIT_RET_ERROR_INFO macro everywhere.